20419640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12451}}^1$

素因数の和:12503

約数の個数: 32

約数和(自身を含む): 47068560

約数和(自身を除く): 26648920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12451, 24902, 49804, 62255, 99608, 124510, 249020, 498040, 510491, 1020982, 2041964, 2552455, 4083928, 5104910, 10209820, 20419640]

約数ペア:

[(1, 20419640), (2, 10209820), (4, 5104910), (5, 4083928), (8, 2552455), (10, 2041964), (20, 1020982), (40, 510491), (41, 498040), (82, 249020), (164, 124510), (205, 99608), (328, 62255), (410, 49804), (820, 24902), (1640, 12451)]